Pin and socket connection



1943- M. LlTWlN ETAL 2,325,691

PIN AND SOCKET CONNECTION Filed June 12, 1942 I y l INVENTOR.

Oneof the objects oi the pro v been to provide a socket connectioninwhich the,

t I j Another object of the invention has provision of a spring elementflfor holding the pin tightly against the innjensurfaceoi? the'socketi" a; showin Figure5is Benn g 3, 1943' m so its

. nectionas" part of: a plugassemblyr; inlanaielectrie cal wiringjisystem and is particularly directedfto nation.

' uthelconstructionot "the socketiin? such a comm- 1 "In a copen'dinglapplication filed May I'YI; 1942,

a form of pin and socket connection having cer-v "tain advantages is disclosed and clainied." The MIT: .11 w; ETCONNEGTION Maix i Litwiif.and?liertraznfflMilner;" inciimati, t

ohio assi'gnors toiutwin re sons Cincin ti,

e M FPQWPQ qh I L tatstitiai i jSerial No. 446,782 T 1 a 36m ns; got q:sweetest-tome a, pin 'andi mam 7 otthe interioroithe socket.

.springeelement; depends intothe interior {of the,

Asbe s own nfieu e 2: the k s n mll i a 1 is indicated asl andthe pin as -2," The mouth I z -one ns o e sock i h0wn.,as 3.-i; spring element 4 is positioned in the casing of the socket ve j. a s ot; r openin wform d; the

et. 1 In the p e e red. em od cntsh wn th tion is directed, solves this problem in a-substan t different way. Theconstruction of the prasentinvention includes a number of specific advantages "not present in the; construction of our copending application,

inserted pm is 1 forced against an inner surface two different placesthereby providing [a maximum of contact between the pin and tundertension; saidspringtelenient beingso cona stlfucted' and configurated that it may be held flrmly in position againstfmoveinent inany di-,

rection by folded-over; tangsk or l ears projecting from thesurface of the case;and preferably-inej n l tegraily associated therewith?- l 1 i I 1;

1 Other andjurther advantages will be apparent i'ronithe further and more detaileddescription with the drawing in which: a 1

, of the invention when considered in: conjunction sent invention has spring element has its ends-5; secured to th cas; 7 ing of the socket by tangs 1 which may be cut from the socket'casing. 'This attachment is best n shown in.Figure4.

t As the pin is inserted in the socket, it comthe spring in the manner shown in Figure 2 a nrd places the spring under tension'thereby forcing the pin againstthe inner a surface of the socket on the side opposite to that" mences to engage on which the springis positioned. at

. i g I socket and f 1 greatlyilowering the potential dropQr f1; i V heenthe When the pin is fully between the pin. and theinner' surfaceot :the

socket is along theentire length oflthepin and casing and not merely at one ortwo pointsiasin some constructions of this general type. This, 1 feature o'f the invention'is ciearly shown in Fig- 111153." v v V In orderto' achieve a simple yet eflective means against either linealor 'of attachment of the spring. to the casing the 3 preferred embodiment of the invention contemt plates 'aspring in "shown in 'Figure which the ends are indented as the tan'gs '1 tohold the springvery securely n lateral movement." if i importantjfeature ofthe invention is illus- I trated in Figure 5.

This figuresho'ws the preotherwise formedilin the innerusurface of the c socket'casing preferably along its entire length. "i n This trough may be positionedidirectly opposite 1 Figure 1 is a. perspectiveview'of the pin and:

socket connection of the presentinvention in "as- 1 i "sembledconditiori (l t I i l Figure 2 is an enlarged sectional view along the I linef2--2, Figure 1, showing sertedinthe socket; A v Figure 3 iso similanviewshowing thepin Iully I? Figure 4 is a. sectionalplan View along'the. line [the attachmentfof they 1 spring to the casing.

t e pin p r l 1 a sectional nat ons the 5-4;; 55

to that part of the casing wall inwhich the spring is inserted asjshownin Figure 5. '-The purpose of j the trough is to permit th'e seating of the pin H against the'inner wall ofthesocket in such a 'way r that a double lineal. contact is established as fat fthel pointst lo i-"Imagine In this way there l is exactly "twice as;much;,area contact between it the outer surface of. the pin and the inner sur- 7 *face ofthe socket as would bethe case if both werev round and the'trough werenot provided. t In fitting the spring 4 into jiposition in the :socketycasing' the preferred construction contem inserted; as shown inj j, Figure 3, the spring holds itjfirmly positioned against the innersurface of the socket 8 Due to the comparative length of the spring the contact 4;. This configuration permits ferredconstruction oi the interionofthe socket. In thisconstruction alV-shapedtroughis cut or to ihe limited only" by plates that it maybe bent inwardly around shoul cure but one which at the same time smooth and even disengagement.

The configuration oi the springand theattachpermits a ment to the. casing of the. socket are obviously not essential to the practice of the entire invention although the forms shown are particularlyv effective and practical and constitutethe pre';-"

ferred form;

It will be apparent that various changes may be made in the forms of the el'einentsiand the oon- -j parts vvithou-t j departing from the spirit of the invention as here in disclosed. l

Having fully described our invention, we desire; I v

20' position against movement inany direction, said struotion and arrangement of the I the ensuing claims V lj Inia pin and "sooket-Z Connection; a socket of generally tubular. config in'ation havingfa longi tudina-l slot-in the {outer casing thereof; a esilient str-ip spring el-e'm-entsuspendedacrosssaid slot 7 anddepending intothe "interior of '"the soeket v andtangspositioned-omthe' outer surfaceof thecasi-ngatbothends of theslot, said tangs engaging theends of the spring element and maintaining thefsafme -;securely =inposition against mover-n ent in anydireetion; 1 r I I 2,325,691, j s V 2. A socket for the reception of a pin compris-.f

. ing ahollow tube having a longitudinal slot inthe outer casing thereof: and a V-shaped trough formed in the inner surface'offsaid socket oppoing a hollow tube having a longitudinal slot therein, a strip spring-element disposed in said; slot, it

said spring elenienthaving' anotch formed in each end thereof and a tang positioned onthe side of the tube at each end of the spring, said tangs being adapted to engage with the notched ends ofthe spring for maintainingtlaev same sei curely against movement in any direction.

3. A socket forzthe reception of'a pin comprissite-the slot, a resilient spring element disposed ain'said slot and depending into the interior of Y slot gsaid tangsrengaging the ends of the spring element and maintaining the same securely in spring tzbeingfadapted to maintain? a pin "positioned i. IJIAX LITWiN: a BERIRAMfMIENERE thesoeket*andQtangs positioned on the outer inthexs ocket in' lineahenga'gement"withrthe' 'dges oilthe:syeshapedstrough:"andtherebyato' establish f a :aidouble lineal-rcontact betweenuthe pinzands'the V .25 socket. I 

